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sta2x11_vip.c
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sta2x11_vip.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
* This is the driver for the STA2x11 Video Input Port.
*
* Copyright (C) 2012 ST Microelectronics
* author: Federico Vaga <federico.vaga@gmail.com>
* Copyright (C) 2010 WindRiver Systems, Inc.
* authors: Andreas Kies <andreas.kies@windriver.com>
* Vlad Lungu <vlad.lungu@windriver.com>
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/videodev2.h>
#include <linux/kmod.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
#include <media/videobuf2-dma-contig.h>
#include "sta2x11_vip.h"
#define DRV_VERSION "1.3"
#ifndef PCI_DEVICE_ID_STMICRO_VIP
#define PCI_DEVICE_ID_STMICRO_VIP 0xCC0D
#endif
#define MAX_FRAMES 4
/*Register offsets*/
#define DVP_CTL 0x00
#define DVP_TFO 0x04
#define DVP_TFS 0x08
#define DVP_BFO 0x0C
#define DVP_BFS 0x10
#define DVP_VTP 0x14
#define DVP_VBP 0x18
#define DVP_VMP 0x1C
#define DVP_ITM 0x98
#define DVP_ITS 0x9C
#define DVP_STA 0xA0
#define DVP_HLFLN 0xA8
#define DVP_RGB 0xC0
#define DVP_PKZ 0xF0
/*Register fields*/
#define DVP_CTL_ENA 0x00000001
#define DVP_CTL_RST 0x80000000
#define DVP_CTL_DIS (~0x00040001)
#define DVP_IT_VSB 0x00000008
#define DVP_IT_VST 0x00000010
#define DVP_IT_FIFO 0x00000020
#define DVP_HLFLN_SD 0x00000001
#define SAVE_COUNT 8
#define AUX_COUNT 3
#define IRQ_COUNT 1
struct vip_buffer {
struct vb2_v4l2_buffer vb;
struct list_head list;
dma_addr_t dma;
};
static inline struct vip_buffer *to_vip_buffer(struct vb2_v4l2_buffer *vb2)
{
return container_of(vb2, struct vip_buffer, vb);
}
/**
* struct sta2x11_vip - All internal data for one instance of device
* @v4l2_dev: device registered in v4l layer
* @video_dev: properties of our device
* @pdev: PCI device
* @adapter: contains I2C adapter information
* @register_save_area: All relevant register are saved here during suspend
* @decoder: contains information about video DAC
* @ctrl_hdl: handler for control framework
* @format: pixel format, fixed UYVY
* @std: video standard (e.g. PAL/NTSC)
* @input: input line for video signal ( 0 or 1 )
* @disabled: Device is in power down state
* @slock: for excluse access of registers
* @vb_vidq: queue maintained by videobuf2 layer
* @buffer_list: list of buffer in use
* @sequence: sequence number of acquired buffer
* @active: current active buffer
* @lock: used in videobuf2 callback
* @v4l_lock: serialize its video4linux ioctls
* @tcount: Number of top frames
* @bcount: Number of bottom frames
* @overflow: Number of FIFO overflows
* @iomem: hardware base address
* @config: I2C and gpio config from platform
*
* All non-local data is accessed via this structure.
*/
struct sta2x11_vip {
struct v4l2_device v4l2_dev;
struct video_device video_dev;
struct pci_dev *pdev;
struct i2c_adapter *adapter;
unsigned int register_save_area[IRQ_COUNT + SAVE_COUNT + AUX_COUNT];
struct v4l2_subdev *decoder;
struct v4l2_ctrl_handler ctrl_hdl;
struct v4l2_pix_format format;
v4l2_std_id std;
unsigned int input;
int disabled;
spinlock_t slock;
struct vb2_queue vb_vidq;
struct list_head buffer_list;
unsigned int sequence;
struct vip_buffer *active; /* current active buffer */
spinlock_t lock; /* Used in videobuf2 callback */
struct mutex v4l_lock;
/* Interrupt counters */
int tcount, bcount;
int overflow;
void __iomem *iomem; /* I/O Memory */
struct vip_config *config;
};
static const unsigned int registers_to_save[AUX_COUNT] = {
DVP_HLFLN, DVP_RGB, DVP_PKZ
};
static struct v4l2_pix_format formats_50[] = {
{ /*PAL interlaced */
.width = 720,
.height = 576,
.pixelformat = V4L2_PIX_FMT_UYVY,
.field = V4L2_FIELD_INTERLACED,
.bytesperline = 720 * 2,
.sizeimage = 720 * 2 * 576,
.colorspace = V4L2_COLORSPACE_SMPTE170M},
{ /*PAL top */
.width = 720,
.height = 288,
.pixelformat = V4L2_PIX_FMT_UYVY,
.field = V4L2_FIELD_TOP,
.bytesperline = 720 * 2,
.sizeimage = 720 * 2 * 288,
.colorspace = V4L2_COLORSPACE_SMPTE170M},
{ /*PAL bottom */
.width = 720,
.height = 288,
.pixelformat = V4L2_PIX_FMT_UYVY,
.field = V4L2_FIELD_BOTTOM,
.bytesperline = 720 * 2,
.sizeimage = 720 * 2 * 288,
.colorspace = V4L2_COLORSPACE_SMPTE170M},
};
static struct v4l2_pix_format formats_60[] = {
{ /*NTSC interlaced */
.width = 720,
.height = 480,
.pixelformat = V4L2_PIX_FMT_UYVY,
.field = V4L2_FIELD_INTERLACED,
.bytesperline = 720 * 2,
.sizeimage = 720 * 2 * 480,
.colorspace = V4L2_COLORSPACE_SMPTE170M},
{ /*NTSC top */
.width = 720,
.height = 240,
.pixelformat = V4L2_PIX_FMT_UYVY,
.field = V4L2_FIELD_TOP,
.bytesperline = 720 * 2,
.sizeimage = 720 * 2 * 240,
.colorspace = V4L2_COLORSPACE_SMPTE170M},
{ /*NTSC bottom */
.width = 720,
.height = 240,
.pixelformat = V4L2_PIX_FMT_UYVY,
.field = V4L2_FIELD_BOTTOM,
.bytesperline = 720 * 2,
.sizeimage = 720 * 2 * 240,
.colorspace = V4L2_COLORSPACE_SMPTE170M},
};
/* Write VIP register */
static inline void reg_write(struct sta2x11_vip *vip, unsigned int reg, u32 val)
{
iowrite32((val), (vip->iomem)+(reg));
}
/* Read VIP register */
static inline u32 reg_read(struct sta2x11_vip *vip, unsigned int reg)
{
return ioread32((vip->iomem)+(reg));
}
/* Start DMA acquisition */
static void start_dma(struct sta2x11_vip *vip, struct vip_buffer *vip_buf)
{
unsigned long offset = 0;
if (vip->format.field == V4L2_FIELD_INTERLACED)
offset = vip->format.width * 2;
spin_lock_irq(&vip->slock);
/* Enable acquisition */
reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) | DVP_CTL_ENA);
/* Set Top and Bottom Field memory address */
reg_write(vip, DVP_VTP, (u32)vip_buf->dma);
reg_write(vip, DVP_VBP, (u32)vip_buf->dma + offset);
spin_unlock_irq(&vip->slock);
}
/* Fetch the next buffer to activate */
static void vip_active_buf_next(struct sta2x11_vip *vip)
{
/* Get the next buffer */
spin_lock(&vip->lock);
if (list_empty(&vip->buffer_list)) {/* No available buffer */
spin_unlock(&vip->lock);
return;
}
vip->active = list_first_entry(&vip->buffer_list,
struct vip_buffer,
list);
/* Reset Top and Bottom counter */
vip->tcount = 0;
vip->bcount = 0;
spin_unlock(&vip->lock);
if (vb2_is_streaming(&vip->vb_vidq)) { /* streaming is on */
start_dma(vip, vip->active); /* start dma capture */
}
}
/* Videobuf2 Operations */
static int queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], struct device *alloc_devs[])
{
struct sta2x11_vip *vip = vb2_get_drv_priv(vq);
if (!(*nbuffers) || *nbuffers < MAX_FRAMES)
*nbuffers = MAX_FRAMES;
*nplanes = 1;
sizes[0] = vip->format.sizeimage;
vip->sequence = 0;
vip->active = NULL;
vip->tcount = 0;
vip->bcount = 0;
return 0;
};
static int buffer_init(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct vip_buffer *vip_buf = to_vip_buffer(vbuf);
vip_buf->dma = vb2_dma_contig_plane_dma_addr(vb, 0);
INIT_LIST_HEAD(&vip_buf->list);
return 0;
}
static int buffer_prepare(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue);
struct vip_buffer *vip_buf = to_vip_buffer(vbuf);
unsigned long size;
size = vip->format.sizeimage;
if (vb2_plane_size(vb, 0) < size) {
v4l2_err(&vip->v4l2_dev, "buffer too small (%lu < %lu)\n",
vb2_plane_size(vb, 0), size);
return -EINVAL;
}
vb2_set_plane_payload(&vip_buf->vb.vb2_buf, 0, size);
return 0;
}
static void buffer_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue);
struct vip_buffer *vip_buf = to_vip_buffer(vbuf);
spin_lock(&vip->lock);
list_add_tail(&vip_buf->list, &vip->buffer_list);
if (!vip->active) { /* No active buffer, active the first one */
vip->active = list_first_entry(&vip->buffer_list,
struct vip_buffer,
list);
if (vb2_is_streaming(&vip->vb_vidq)) /* streaming is on */
start_dma(vip, vip_buf); /* start dma capture */
}
spin_unlock(&vip->lock);
}
static void buffer_finish(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue);
struct vip_buffer *vip_buf = to_vip_buffer(vbuf);
/* Buffer handled, remove it from the list */
spin_lock(&vip->lock);
list_del_init(&vip_buf->list);
spin_unlock(&vip->lock);
if (vb2_is_streaming(vb->vb2_queue))
vip_active_buf_next(vip);
}
static int start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct sta2x11_vip *vip = vb2_get_drv_priv(vq);
spin_lock_irq(&vip->slock);
/* Enable interrupt VSYNC Top and Bottom*/
reg_write(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST);
spin_unlock_irq(&vip->slock);
if (count)
start_dma(vip, vip->active);
return 0;
}
/* abort streaming and wait for last buffer */
static void stop_streaming(struct vb2_queue *vq)
{
struct sta2x11_vip *vip = vb2_get_drv_priv(vq);
struct vip_buffer *vip_buf, *node;
/* Disable acquisition */
reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA);
/* Disable all interrupts */
reg_write(vip, DVP_ITM, 0);
/* Release all active buffers */
spin_lock(&vip->lock);
list_for_each_entry_safe(vip_buf, node, &vip->buffer_list, list) {
vb2_buffer_done(&vip_buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
list_del(&vip_buf->list);
}
spin_unlock(&vip->lock);
}
static const struct vb2_ops vip_video_qops = {
.queue_setup = queue_setup,
.buf_init = buffer_init,
.buf_prepare = buffer_prepare,
.buf_finish = buffer_finish,
.buf_queue = buffer_queue,
.start_streaming = start_streaming,
.stop_streaming = stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
/* File Operations */
static const struct v4l2_file_operations vip_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.release = vb2_fop_release,
.unlocked_ioctl = video_ioctl2,
.read = vb2_fop_read,
.mmap = vb2_fop_mmap,
.poll = vb2_fop_poll
};
/**
* vidioc_querycap - return capabilities of device
* @file: descriptor of device
* @cap: contains return values
* @priv: unused
*
* the capabilities of the device are returned
*
* return value: 0, no error.
*/
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
strscpy(cap->card, KBUILD_MODNAME, sizeof(cap->card));
return 0;
}
/**
* vidioc_s_std - set video standard
* @file: descriptor of device
* @std: contains standard to be set
* @priv: unused
*
* the video standard is set
*
* return value: 0, no error.
*
* -EIO, no input signal detected
*
* other, returned from video DAC.
*/
static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std)
{
struct sta2x11_vip *vip = video_drvdata(file);
/*
* This is here for backwards compatibility only.
* The use of V4L2_STD_ALL to trigger a querystd is non-standard.
*/
if (std == V4L2_STD_ALL) {
v4l2_subdev_call(vip->decoder, video, querystd, &std);
if (std == V4L2_STD_UNKNOWN)
return -EIO;
}
if (vip->std != std) {
vip->std = std;
if (V4L2_STD_525_60 & std)
vip->format = formats_60[0];
else
vip->format = formats_50[0];
}
return v4l2_subdev_call(vip->decoder, video, s_std, std);
}
/**
* vidioc_g_std - get video standard
* @file: descriptor of device
* @priv: unused
* @std: contains return values
*
* the current video standard is returned
*
* return value: 0, no error.
*/
static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std)
{
struct sta2x11_vip *vip = video_drvdata(file);
*std = vip->std;
return 0;
}
/**
* vidioc_querystd - get possible video standards
* @file: descriptor of device
* @priv: unused
* @std: contains return values
*
* all possible video standards are returned
*
* return value: delivered by video DAC routine.
*/
static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std)
{
struct sta2x11_vip *vip = video_drvdata(file);
return v4l2_subdev_call(vip->decoder, video, querystd, std);
}
static int vidioc_enum_input(struct file *file, void *priv,
struct v4l2_input *inp)
{
if (inp->index > 1)
return -EINVAL;
inp->type = V4L2_INPUT_TYPE_CAMERA;
inp->std = V4L2_STD_ALL;
sprintf(inp->name, "Camera %u", inp->index);
return 0;
}
/**
* vidioc_s_input - set input line
* @file: descriptor of device
* @priv: unused
* @i: new input line number
*
* the current active input line is set
*
* return value: 0, no error.
*
* -EINVAL, line number out of range
*/
static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
struct sta2x11_vip *vip = video_drvdata(file);
int ret;
if (i > 1)
return -EINVAL;
ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0);
if (!ret)
vip->input = i;
return 0;
}
/**
* vidioc_g_input - return input line
* @file: descriptor of device
* @priv: unused
* @i: returned input line number
*
* the current active input line is returned
*
* return value: always 0.
*/
static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
struct sta2x11_vip *vip = video_drvdata(file);
*i = vip->input;
return 0;
}
/**
* vidioc_enum_fmt_vid_cap - return video capture format
* @file: descriptor of device
* @priv: unused
* @f: returned format information
*
* returns name and format of video capture
* Only UYVY is supported by hardware.
*
* return value: always 0.
*/
static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
if (f->index != 0)
return -EINVAL;
f->pixelformat = V4L2_PIX_FMT_UYVY;
return 0;
}
/**
* vidioc_try_fmt_vid_cap - set video capture format
* @file: descriptor of device
* @priv: unused
* @f: new format
*
* new video format is set which includes width and
* field type. width is fixed to 720, no scaling.
* Only UYVY is supported by this hardware.
* the minimum height is 200, the maximum is 576 (PAL)
*
* return value: 0, no error
*
* -EINVAL, pixel or field format not supported
*
*/
static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct sta2x11_vip *vip = video_drvdata(file);
int interlace_lim;
if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) {
v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n");
return -EINVAL;
}
if (V4L2_STD_525_60 & vip->std)
interlace_lim = 240;
else
interlace_lim = 288;
switch (f->fmt.pix.field) {
default:
case V4L2_FIELD_ANY:
if (interlace_lim < f->fmt.pix.height)
f->fmt.pix.field = V4L2_FIELD_INTERLACED;
else
f->fmt.pix.field = V4L2_FIELD_BOTTOM;
break;
case V4L2_FIELD_TOP:
case V4L2_FIELD_BOTTOM:
if (interlace_lim < f->fmt.pix.height)
f->fmt.pix.height = interlace_lim;
break;
case V4L2_FIELD_INTERLACED:
break;
}
/* It is the only supported format */
f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
f->fmt.pix.height &= ~1;
if (2 * interlace_lim < f->fmt.pix.height)
f->fmt.pix.height = 2 * interlace_lim;
if (200 > f->fmt.pix.height)
f->fmt.pix.height = 200;
f->fmt.pix.width = 720;
f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
return 0;
}
/**
* vidioc_s_fmt_vid_cap - set current video format parameters
* @file: descriptor of device
* @priv: unused
* @f: returned format information
*
* set new capture format
* return value: 0, no error
*
* other, delivered by video DAC routine.
*/
static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct sta2x11_vip *vip = video_drvdata(file);
unsigned int t_stop, b_stop, pitch;
int ret;
ret = vidioc_try_fmt_vid_cap(file, priv, f);
if (ret)
return ret;
if (vb2_is_busy(&vip->vb_vidq)) {
/* Can't change format during acquisition */
v4l2_err(&vip->v4l2_dev, "device busy\n");
return -EBUSY;
}
vip->format = f->fmt.pix;
switch (vip->format.field) {
case V4L2_FIELD_INTERLACED:
t_stop = ((vip->format.height / 2 - 1) << 16) |
(2 * vip->format.width - 1);
b_stop = t_stop;
pitch = 4 * vip->format.width;
break;
case V4L2_FIELD_TOP:
t_stop = ((vip->format.height - 1) << 16) |
(2 * vip->format.width - 1);
b_stop = (0 << 16) | (2 * vip->format.width - 1);
pitch = 2 * vip->format.width;
break;
case V4L2_FIELD_BOTTOM:
t_stop = (0 << 16) | (2 * vip->format.width - 1);
b_stop = (vip->format.height << 16) |
(2 * vip->format.width - 1);
pitch = 2 * vip->format.width;
break;
default:
v4l2_err(&vip->v4l2_dev, "unknown field format\n");
return -EINVAL;
}
spin_lock_irq(&vip->slock);
/* Y-X Top Field Offset */
reg_write(vip, DVP_TFO, 0);
/* Y-X Bottom Field Offset */
reg_write(vip, DVP_BFO, 0);
/* Y-X Top Field Stop*/
reg_write(vip, DVP_TFS, t_stop);
/* Y-X Bottom Field Stop */
reg_write(vip, DVP_BFS, b_stop);
/* Video Memory Pitch */
reg_write(vip, DVP_VMP, pitch);
spin_unlock_irq(&vip->slock);
return 0;
}
/**
* vidioc_g_fmt_vid_cap - get current video format parameters
* @file: descriptor of device
* @priv: unused
* @f: contains format information
*
* returns current video format parameters
*
* return value: 0, always successful
*/
static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct sta2x11_vip *vip = video_drvdata(file);
f->fmt.pix = vip->format;
return 0;
}
static const struct v4l2_ioctl_ops vip_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
/* FMT handling */
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
/* Buffer handlers */
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
/* Stream on/off */
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
/* Standard handling */
.vidioc_g_std = vidioc_g_std,
.vidioc_s_std = vidioc_s_std,
.vidioc_querystd = vidioc_querystd,
/* Input handling */
.vidioc_enum_input = vidioc_enum_input,
.vidioc_g_input = vidioc_g_input,
.vidioc_s_input = vidioc_s_input,
/* Log status ioctl */
.vidioc_log_status = v4l2_ctrl_log_status,
/* Event handling */
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
static const struct video_device video_dev_template = {
.name = KBUILD_MODNAME,
.release = video_device_release_empty,
.fops = &vip_fops,
.ioctl_ops = &vip_ioctl_ops,
.tvnorms = V4L2_STD_ALL,
.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
V4L2_CAP_STREAMING,
};
/**
* vip_irq - interrupt routine
* @irq: Number of interrupt ( not used, correct number is assumed )
* @data: local data structure containing all information
*
* check for both frame interrupts set ( top and bottom ).
* check FIFO overflow, but limit number of log messages after open.
* signal a complete buffer if done
*
* return value: IRQ_NONE, interrupt was not generated by VIP
*
* IRQ_HANDLED, interrupt done.
*/
static irqreturn_t vip_irq(int irq, void *data)
{
struct sta2x11_vip *vip = data;
unsigned int status;
status = reg_read(vip, DVP_ITS);
if (!status) /* No interrupt to handle */
return IRQ_NONE;
if (status & DVP_IT_FIFO)
if (vip->overflow++ > 5)
pr_info("VIP: fifo overflow\n");
if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) {
/* this is bad, we are too slow, hope the condition is gone
* on the next frame */
return IRQ_HANDLED;
}
if (status & DVP_IT_VST)
if ((++vip->tcount) < 2)
return IRQ_HANDLED;
if (status & DVP_IT_VSB) {
vip->bcount++;
return IRQ_HANDLED;
}
if (vip->active) { /* Acquisition is over on this buffer */
/* Disable acquisition */
reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA);
/* Remove the active buffer from the list */
vip->active->vb.vb2_buf.timestamp = ktime_get_ns();
vip->active->vb.sequence = vip->sequence++;
vb2_buffer_done(&vip->active->vb.vb2_buf, VB2_BUF_STATE_DONE);
}
return IRQ_HANDLED;
}
static void sta2x11_vip_init_register(struct sta2x11_vip *vip)
{
/* Register initialization */
spin_lock_irq(&vip->slock);
/* Clean interrupt */
reg_read(vip, DVP_ITS);
/* Enable Half Line per vertical */
reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD);
/* Reset VIP control */
reg_write(vip, DVP_CTL, DVP_CTL_RST);
/* Clear VIP control */
reg_write(vip, DVP_CTL, 0);
spin_unlock_irq(&vip->slock);
}
static void sta2x11_vip_clear_register(struct sta2x11_vip *vip)
{
spin_lock_irq(&vip->slock);
/* Disable interrupt */
reg_write(vip, DVP_ITM, 0);
/* Reset VIP Control */
reg_write(vip, DVP_CTL, DVP_CTL_RST);
/* Clear VIP Control */
reg_write(vip, DVP_CTL, 0);
/* Clean VIP Interrupt */
reg_read(vip, DVP_ITS);
spin_unlock_irq(&vip->slock);
}
static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip)
{
int err;
err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29));
if (err) {
v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask");
return err;
}
memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue));
vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ;
vip->vb_vidq.drv_priv = vip;
vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer);
vip->vb_vidq.ops = &vip_video_qops;
vip->vb_vidq.mem_ops = &vb2_dma_contig_memops;
vip->vb_vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
vip->vb_vidq.dev = &vip->pdev->dev;
vip->vb_vidq.lock = &vip->v4l_lock;
err = vb2_queue_init(&vip->vb_vidq);
if (err)
return err;
INIT_LIST_HEAD(&vip->buffer_list);
spin_lock_init(&vip->lock);
return 0;
}
static int sta2x11_vip_init_controls(struct sta2x11_vip *vip)
{
/*
* Inititialize an empty control so VIP can inerithing controls
* from ADV7180
*/
v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0);
vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl;
if (vip->ctrl_hdl.error) {
int err = vip->ctrl_hdl.error;
v4l2_ctrl_handler_free(&vip->ctrl_hdl);
return err;
}
return 0;
}
/**
* vip_gpio_reserve - reserve gpio pin
* @dev: device
* @pin: GPIO pin number
* @dir: direction, input or output
* @name: GPIO pin name
*
*/
static int vip_gpio_reserve(struct device *dev, int pin, int dir,
const char *name)
{
struct gpio_desc *desc = gpio_to_desc(pin);
int ret = -ENODEV;
if (!gpio_is_valid(pin))
return ret;
ret = gpio_request(pin, name);
if (ret) {
dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name);
return ret;
}
ret = gpiod_direction_output(desc, dir);
if (ret) {
dev_err(dev, "Failed to set direction for pin %d (%s)\n",
pin, name);
gpio_free(pin);
return ret;
}
ret = gpiod_export(desc, false);
if (ret) {
dev_err(dev, "Failed to export pin %d (%s)\n", pin, name);
gpio_free(pin);
return ret;
}
return 0;
}
/**
* vip_gpio_release - release gpio pin
* @dev: device
* @pin: GPIO pin number
* @name: GPIO pin name
*
*/
static void vip_gpio_release(struct device *dev, int pin, const char *name)
{
if (gpio_is_valid(pin)) {
struct gpio_desc *desc = gpio_to_desc(pin);
dev_dbg(dev, "releasing pin %d (%s)\n", pin, name);
gpiod_unexport(desc);
gpio_free(pin);
}
}
/**
* sta2x11_vip_init_one - init one instance of video device
* @pdev: PCI device
* @ent: (not used)
*
* allocate reset pins for DAC.
* Reset video DAC, this is done via reset line.
* allocate memory for managing device
* request interrupt
* map IO region
* register device
* find and initialize video DAC
*
* return value: 0, no error
*
* -ENOMEM, no memory
*
* -ENODEV, device could not be detected or registered
*/
static int sta2x11_vip_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int ret;
struct sta2x11_vip *vip;
struct vip_config *config;
/* Check if hardware support 26-bit DMA */
if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) {
dev_err(&pdev->dev, "26-bit DMA addressing not available\n");
return -EINVAL;
}
/* Enable PCI */
ret = pci_enable_device(pdev);
if (ret)
return ret;
/* Get VIP platform data */
config = dev_get_platdata(&pdev->dev);
if (!config) {
dev_info(&pdev->dev, "VIP slot disabled\n");
ret = -EINVAL;
goto disable;
}
/* Power configuration */
ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0,
config->pwr_name);
if (ret)
goto disable;
ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0,
config->reset_name);
if (ret) {
vip_gpio_release(&pdev->dev, config->pwr_pin,
config->pwr_name);
goto disable;
}
if (gpio_is_valid(config->pwr_pin)) {